Combining Zn ion catalysis with homogeneous gold catalysis: an efficient annulation approach to N-protected indoles
作者:Yanzhao Wang、Lianzhu Liu、Liming Zhang
DOI:10.1039/c2sc21333h
日期:——
The Fischer indole synthesis is perhaps the most powerful method for indole preparation, but it often suffers from low regioselectivities with unsymmetric aliphatic ketone substrates and strong acidic conditions and is not suitable for alpha,beta-unsaturated ketones. In this article, we disclose an efficient synthesis of N-protected indoles from N-arylhydroxamic acids/N-aryl-N-hydroxycarbamates and
Ru-catalyzed oxidative dearomatization-alkoxylation of <i>N</i>-Boc indoles
作者:Xiao-Yu Zhou、Xia Chen、Yi-Zhu Lei
DOI:10.1080/00397911.2020.1859542
日期:——
Abstract Ruthenium catalyzed oxidative dearomatization-alkoxylation of N-Boc indoles for the synthesis of 2-alkoxyindolin-3-ones was described. The N-Boc indoles can be transformed into 2-alkoxyindolin-3-ones with RuCl3·3H2O as catalyst and tert-butyl hydroperoxide (TBHP, 3.0 equiv) as oxidant in dichloromethane/alcohol. Furtherly, the mechanism had been proposed on the basis of control experiments
Palladium-Catalyzed Wacker-Type Oxidation of N-Boc Indoles under Mild Conditions
作者:Xiao-Yu Zhou、Xia Chen、Liang-Guang Wang
DOI:10.1055/s-0036-1588069
日期:——
Palladium-catalyzed Wacker-type oxidation of N -Boc indoles for the synthesis of 3-oxyindolines has been developed. The palladium-catalyzed Wacker-type oxidation of N -Boc indoles can readily occur in MeCN using H 2 O 2 as oxidant. And 3-oxyindolines were obtained in medium to high yield. Furtherly, the mechanism of palladium-catalyzed Wacker-type oxidation of N -Boc indoles was proposed.
用于合成 3-羟基二氢吲哚的 N-Boc 吲哚的钯催化瓦克型氧化已被开发出来。N-Boc 吲哚的钯催化瓦克型氧化可以在 MeCN 中使用 H 2 O 2 作为氧化剂容易地发生。并且以中高收率获得了3-羟基二氢吲哚。此外,提出了钯催化N-Boc吲哚的Wacker型氧化的机理。
Synthesis of indoles from aroyloxycarbamates with alkynes <i>via</i> decarboxylation/cyclization
作者:Nuannuan Ma、Peihe Li、Zheng Wang、Qipu Dai、Changwen Hu
DOI:10.1039/c8ob00086g
日期:——
decarboxylation/cyclization of aroyloxycarbamates to realize substituted indoles has been disclosed. Terminal alkynes as the coupling partners lead to site specific 2-substitutedindoles through two pathways, while internal alkynes with aroyloxycarbamates can be transformed to 2,3-disubstituted indoles directly. This protocol is further demonstrated by the efficient synthesis of indoles as well as the
Ruthenium-Catalyzed Oxidative Dearomatization of N-Boc Indoles
作者:Xiao-Yu Zhou、Ming Bao、Xia Chen、Xiu-Juan Feng
DOI:10.1055/s-0040-1706539
日期:2021.3
Abstract Ruthenium-catalyzed oxidative dearomatization of N-Boc indoles for the synthesis of indolin-3-ones is described. The N-Boc indoles can be transformed into indolin-3-ones in acetonitrile, using RuCl3·3H2O as catalyst and sodium periodate (1.5 equiv) as oxidant. Further, a possible mechanism has been proposed on the basis of control experiments. Publication History Received: 01 September 2020